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Flood Watch

Flood Watch
National Weather Service Seattle WA
1013 AM PST Tue Nov 21 2017

WAC009-027-031-033-041-053-057-061-067-073-220700-
/O.CON.KSEW.FA.A.0006.171122T0000Z-171124T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clallam-Grays Harbor-Jefferson-King-Lewis-Pierce-Skagit-Snohomish-
Thurston-Whatcom-
1013 AM PST Tue Nov 21 2017

...FLOOD WATCH REMAINS IN EFFECT FROM 4 PM PST THIS AFTERNOON
THROUGH THURSDAY AFTERNOON...

The Flood Watch continues for

* Portions of northwest Washington and west central Washington,
  including the following counties, in northwest Washington,
  Clallam, Grays Harbor, Jefferson, Skagit, and Whatcom. In west
  central Washington, King, Lewis, Pierce, Snohomish, and
  Thurston.

* From 4 PM PST this afternoon through Thursday afternoon

* Rain has begun ahead of a warm front and the plume of
  subtropical moisture with it that will bring 2 to 5.5 inches of
  rain to the Olympics and Mount Rainier today and tonight, and 1
  to 4 inches of rain to the Cascades north of Mount Rainier. The
  snow level will be near 8000 feet. A second frontal system will
  bring another 1 to 4 inches on Wednesday night and Thursday,
  with the snow level falling from 7000 feet to 4000 feet as the
  system moves through.


* The two systems in close succession presents a threat of
  flooding on rivers in Western Washington. Flooding could begin
  tonight or Wednesday. It looks like the threat is for a
  relatively minor flooding episode for most areas though some may
  get close to moderate severity. Some of the rivers to be at risk
  the earliest include the Snoqualmie, Nooksack, White, Tolt, and
  Skykomish Rivers. Many others are at risk as well. Check out our
  website and the Advanced Hydrologic Prediction Service webpage
  for details.



PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Watch means there is a potential for flooding based on
current forecasts.

You should monitor later forecasts and be alert for possible
Flood Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

&&

$$

www.weather.gov/seattle




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